基于最大比融合的合作频谱感知技术

Cooperative Spectrum Sensing Technology Based on Maximal-ratio Fusion

认知无线电是为了提高频谱利用率而提出的一种智能频谱共享技术,而频谱感知则是实现认知无线电的关键技术。合作频谱感知由于能在一定程度上消除阴影和多径衰落带来的影响而得到广泛的关注。文中提出基于最大比融合的合作频谱感知技术。仿真结果表明,当融合中心采用最大比准则时的检测概率明显高于硬判决融合检测的检测概率。

Cognitive Radio （CR） is an intelligent spectrum sharing technology which has the capability to improve the utilization of spectrum, and spectrum sensing is a key technology of achieving CR. Much more attention has been paid to cooperative sensing because it can eliminate the mud-path and shadowing effect. In this paper, the cooperative spectrum sensing based on maximal-ratio fusion is proposed. Matlab simulation results indicate that the detection probability by using maximal-ratio fusion is significantly higher than that by using hard decision in fusion.